package com.itheima.reggie.filter;

import com.alibaba.fastjson.JSON;
import com.itheima.reggie.common.BaseContext;
import com.itheima.reggie.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

@WebFilter(filterName = "loginCheckFilter", urlPatterns = "/*")
@Slf4j
public class LoginCheckFilter implements Filter {

    public static final AntPathMatcher pathMatcher = new AntPathMatcher();

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;

        String requestURI = request.getRequestURI();

        log.info("拦截到请求: {}", requestURI);

        String[] urls = new String[]{
                "/employee/login",
                "/employee/logout",
                "/user/login",
                "/user/sendMsg",
                "/backend/**",
                "/front/**"
        };

        boolean check = check(urls, requestURI);

        if (check) {
            log.info("本次请求放行", requestURI);
            filterChain.doFilter(request, response);
            return;
        }

        if (request.getSession().getAttribute("loginPhone") != null) {
            Long loginPhone = (Long) request.getSession().getAttribute("loginPhone");
            log.info("客户已登录,请求放行", loginPhone);
            BaseContext.setCurrentId(loginPhone);
            filterChain.doFilter(request, response);
            return;
        }

        if (request.getSession().getAttribute("loginUser") != null) {
            Long loginUser = (Long) request.getSession().getAttribute("loginUser");
            log.info("用户已登录,请求放行", loginUser);
            BaseContext.setCurrentId(loginUser);
            filterChain.doFilter(request, response);
            return;
        } else {
            log.info("用户未登录");
            response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));
            return;
        }

    }

    private boolean check(String[] urls, String requestURI) {
        for (String url : urls) {
            boolean match = pathMatcher.match(url, requestURI);
            if (match) {
                return true;
            }
        }
        return false;
    }
}

